Pokémon XY Save File Structure

X/Y Save files are comprised of 4 sections, the latter two storing the contents of the two savegames.

The game alternates between the two game saves similar to Generations 3 & 4.

Save files are 0x100000 (1MB). The area between sections is either FF or 00, for Cartridges and Digital saves respectively.

Single Partition Save File

http://3dbrew.org/wiki/Savegames

First Partition (0x01000-0x01107)

Save File 1 (0x02000 - 0x6AFFF)

(420 KB)

Start	End	Description
05400	?????	Friends List Related
05800	?????	Items Pocket
05E40	?????	Key Items Pocket
05FC0	?????	TM Pocket
06168	?????	Medicine Pocket
06268	?????	Berry Pocket
06800	?????	Trainer Stat Flags (Style)
07000	?????	Constants?
07400	?????	Flags/Constants?
09600	?????	Trainer Information ($) + Box Names
09E00	?????	Battle Box
0F400	?????	Passerby/Friend Greetings & Data 1
14400	?????	Passerby/Friend Greetings & Data 2
19400	195FF	Trainer Card (ID/SID/OT/Greeting)
19600	?????	Party Members
1A400	?????	Pokedex
1AC00	?????	????
1B400	?????	Fused Zekrom/Reshiram Storage
1BE00	?????	O-Power Flags
1C000	?????	????
1CC00	?????	GTS Upload & Match Criteria
1CE00	?????	????
1D200	?????	????
1E5C8	?????	MAC Address & Network Connection Logging
1E800	?????	Hall of Fame Data
20600	?????	Daycare Data
21000	?????	Wondercard Data (0x100 bitflag-card received storage, followed by Wondercards)
23000	?????	Friend Safari Data
23800	?????	PSS Data
23C00	?????	????
24600	?????	????
25400	?????	Pokemon Bank Gifts
26000	?????	????
26200	?????	PGL Promotion Gifts
27A00	5C4D0	Box Data (31 Boxes, 30 Slots, 232 bytes each)
5C600	?????	Picture Data (JPEG Exif Ver 2.2) ~ 5C654 starts the JPEG (FF D8 marker) - Sent to PGL
6A800	?????	??

Save File 2 (0x81000 - 0xE9FFF)

(420 KB)

Same as Game Save 1's offsets; add 0x7F000.